package com.gimi.cloud.jimi.common.utils;


import java.util.Calendar;
import java.util.Date;

public class DaysChange {

	/**
	 * 得到几天前的时间
	 * @param d
	 * @param day
	 * @return
	 */
	public static Date getDateBefore(Date d,int day){
		Calendar now =Calendar.getInstance();
		now.setTime(d);
		now.set(Calendar.DATE,now.get(Calendar.DATE)-day);
		return now.getTime();
	}

	/**
	 * 得到几天后的时间
	 * @param d
	 * @param day
	 * @return
	 */
	public static Date getDateAfter(Date d,int day){
		Calendar now =Calendar.getInstance();
		now.setTime(d);
		now.set(Calendar.DATE,now.get(Calendar.DATE)+day);
		return now.getTime();
	}




}

